Petroleum incandescent lamp.



0. GOTTKE.

PETROLEUM INGANDBSGENT LAMP. APPLICATION FILED SEPT. 8, 1913.

Patented Mar.10,1914

OTTO GOTTKE, OF HALENSEE, NEAR BERLIN, GERMANY.

PETROLEUM INCANDESCENT LAMP.

Specification of Letters Patent.

Patented Mar. 10, 1914.

Application filed September 8, 1913. Serial No. 788,676.

. The object of this invention is to insure the reliable working oflamps of this kind and more particularly to make them nonsensitive toexternal low temperatures. To that end, care is taken in the new lamp toexpel the liquid fuel contained in the superheater pipe coil at thebeginning of working, by the action of vapors produced by the heating ofthe vaporizer and to introduce it into a liquid separator, in order tocondense the incomingv petroleum vapors in the said separator at thebeginning of the evaporation, and thus to retard the vapor supply to thepipe section leading to the nozzle, until all vapor-conveying pipes havebeen heated sufficiently strongly to avoid condensation. For receivingthe liquid fuel in the superheater pipe coil at the beginning of theworking, there is arranged in the interior of the solid foot of thechimney, an annular tank engaging with its outer wall the inner wall ofthe said foot above the cup for the fuel for the warming up flame.

ln order to insure quick and reliable ignition of the main llame, careis taken to provide a separate ignition flame supplied with fuel fromthe warming-up cup. ing of this ignition or by-pass flame is effected bya vaporizer secured to the warming cup and provided with a removableupper part. The ignition flame pipe is arranged in the latter in such amanner that when the cup is placed on the gasifier, 1t forms aresistance in order to avoid closing of the gas outlet opening by theporous material.

ln order to prevent disturbing outer air from getting to the edge of theglass bell, the bell ring supporting the bell andihinged to the lampreflector, is provided with two grooves directed in opposite directions,for receiving packing material, and is made 1n two sections, so that thelower part detach- The feed-` ably mounted on the part hinged directlvto the reflector, can press the edge of thb glass bell against thepacking material in the downward groove of the upper part.

A construction according to this invention is illustrated in theaccompanying drawing, in which,-

Figure 1 is a central vertical section through a lamp vconstructed inaccordance with the invention; Fig.f2 is a top View of a part of thereflector of the lamp; and Fig. 3 is a sectional view of the means usedfor connecting the lamp globe with the reflector.

A solid base 1 forms a support for the main parts of the lamp. On thesaid base is mounted the foot 2 of the chimney 3, so that the chimneycan be raised with its foot, in order to enable the evaporating deviceto be easily removed. The evaporating pipe 4t is directly connected, bymeans of a right angle bend 5, to a superheater pipe coil 6 which iscarried upward in the annular fuel tank 7 to a point above the level ofthe fuel and provided with an opening 8. The fuel is conveyed from thetank 7 to the vaporizer l through the pipe 9, which is provided in anydesired manner with a closing valve 10.

11 is the annular liquid separator inserted in the solid foot 2 of thechimney and engaging with its outer wall against the part 2. Thesuperheater pipe 6 opens with its downward branch into the tank 11. Thefuel vapors are conveyed from the tank 11 thro-ugh the pipe bend 12 andpass through a pipe 13 arranged transversely below the chimney, into thenozzle 14. The section of the pipe 13 arranged in front of the nozzle14, is mounted in a boxeshaped projection 15, 16 of the foot 2 of thechimney and of the base 1, so that those portions of the pipe, adjoiningthe nozzle are exposed, to the waste heat. In the base 1 is arranged theannular warming up cup 17, through the bottom of which passes a ring oftubes 18 open on both sides and used for supplying air to the warming upflame and giving the latter the nature of a ring flame. The air is takenfrom the interior of the glass bell or globe 19 into which it passes toa limited eX- tent through openings 2O at the lower end of the globe.The mixing tube 21 is secured to the reflector' 22, and opens outsidethe glass globe. The globe itself is secured to the reflector by meansof a two-sectioned metal ring 23, 24 hinged to the reflector. The metalring 23 is provided with two grooves 25, 26 for receiving packingmaterial above and below. The globe 19 is pressed by the part 24detachably secured to the part 23, against the packing material in thegroove,

26, so that any passage of air along theY ring and the edge of the globeinto the interior of the globe is avoided. 'Ihe division of the globering into two, makes it possible to replace in a simple manner a brokenglobe by simply unscrewing the part 24.- from the part 23, without itbeing necessary to cover the globe again with a metal net, as the metalnet 27 is supported by the detachable ring portion 24 and can be liftedoid' with the same from the globe.

VThe globe is perforated at the lower end and provided with a downwardlyprojecting insertion 28 protecting the air inlet openings 2O from draft.Over the bottom end of the globe a drip cup 29 projects screwed to thebottom portion 30 of the mixing tube. The burner 31 is shown as havingan upright incandescent mantel 32.

On the upper side of the reflector 22 a protecting casing 33 is mountedprovided with openings 34: for admitting fresh air. The reflector isalso provided at its outer edge with air inlet openings 35. An ignitionflame evaporator 36 is secured to the warming up cup 17 and providedwith fuel inlet openings 37. The ignition flame tube is marked 38. Thefilling pipe for the warming cup is marked 39.

The working and the manipulation of the lamp are as follows The valve 10having been opened, the fuel from the tank 7 will pass through the pipe9 and the evaporator et into the rising pipe of the superheater pipecoil 6. If the fuel in the warming cup 17, is then lighted, the fuelcontained in the evaporator and at the lower end of the rising branch ofthe superheater pipe coil 6, begins to evaporate. The vapors producedforce the liquid fuel contained in the rising branch of the superheaterpipe 6 out of the pipe, so that it is projected into the liquidseparator 11. Here it remains for a time, and owing to its comparativelylow temperature, brings about condensation ofthe vapors first arrivingthrough the superheater pipe 6, so that the feeding of the pipe sections12, 13 and of the nozzle 14 is at first retarded. In the meantime, owingto the energetic action of the warming up flame, all gas conveyingportions of the piping and of the liquid separator 11 will be furtherheated, so that finally a state is reached, in which the vapors passingfrom the superheater pipe coil 6 into the tank 11, are no longercondensed, but pass in the form of strongly superheated vapors into thepipe sections 12, 13 and to the nozzle 14. The vapors carry away withthem from the inner space of the casing 33, warmed fresh air admittedthrough the openings 34, 35. The mixture of air and vapors passes intothe mixing tube 21 and from the latter to the burner 31. Any portionsstill condensing, are received by the drip cup 29. During thepreliminary heating liquid fuel passes from the warming cup 17 throughthe openings 37 into the ignition flame evaporator 36 and is hereevaporated, so that through the ignition flame pipe 38 combustiblevapors escape which are ignited by the warming up flame, so that anignition flame directed downward is produced and can light the mainflame.

Owing to the special shape of the liquid separator and its arrangementat the foot of the chimney, both the gases of the warming up flameandthe waste gases of the main llame, owing to the energetic suctionproduced by the long chimney, heat the surface of the inner wall and thebottom of the liquid separator in such a manner that only stronglysuperheated and dried vapors can reach the nozzle. As is well known,solid coke-like residue is separated from the petroleum by such strongsuperheating. In order to prevent the said residue from interfering withthe escape of gas from the nozzle, the gas outlet in the liquidseparator is arranged at the highest possible level. Thus the injuriousresidue is deposited in the liquid separator.

l/Vhen the globe 19 breaks, the ring portion 24 is unscrewed, so thatthe globe 19 can be removed together with the protect-ing net 27. A newglobe can be thereupon inserted into the protecting net, and the ringportion 24 again screwed to the ring portion 23.

I wish to be understood that the lamp construction above described maybe modified without leaving the scope of my invention. For instancetubes 18 in the warming up cup may be dispensed with and the pipe bend12 may be connected to the nozzle 14 in any appropriate way withoutproviding the box-shaped extension 15, 16.

Vhat I claim is 1. In a petroleum incandescent lamp provided with achimney, a burner, an evaporating pipe, a fuel tank connected theretoand positioned at a higher level than the evaporating pipe, asuperheater pipe coil having one end connected to said evaporating pipeand rising upward beyond the level of the fuel in the tank, asubstantially annular liquid separator receiving the outlet end of saidsuperheater pipe coil the central space inclosed thereby forming theentrance of the chimney, a conduit adapted to carry the fuel vapors fromsaid liquid separator to said burner, and a warming up cup, the liquidseparator being disposed above said evaporating pipe and warming up cup.

2. In a petroleum incandescent lamp giving an intense light, a burner,an evaporating pipe, a fuel tank connected thereto and positioned at ahigher level than the evaporating pipe, a superheater pipe coil havingone end connected to said evaporating pipe and rising upward beyond thelevel of the fuel in the tank, a substantially annular liquid separatorreceiving the outlet end of said superheater pipe coil, a chimneysurrounding the superheater pipe coil and the liquid separator andhaving the inner Wall of its lower vend substantially in Contact Withsaid annu lar liquid separator, a conduit adapted to carry the fuelvapors from said liquid separator to said burner, and a Warming up Cup,the liquid separator being disposed above said evaporating pipe andWarming up cup.

3. ln a petroleum incandescent lamp giving an intense light, a burner,an evaporating pipe, a fuel tank connected thereto and positioned at ahigher level than the evaporating pipe, a superheater pipe coil havingone end connected to said evaporating pipe and-rising upward beyond thelevel of the fuel in the tank, a substantially annular i liquidseparator receiving the outlet end of said superheater pipe coil, aconduit adapted to carry the fuel vapors from said liquid separator tosaid burner, a Chimney surrounding the superheater pipe coil and theliquid separator, a base member carrying the gasifying device and theWarmingv up cup, the foot of said chimney being detachably mounted onsaid base member and with its inner Wall substantially in contact withthe outer Wall of the annular liquid separator and a Warming up cup, theliquid separator being disposed above said evaporating pipe and Warmingup cup.

In testimony whereof, I affix my signature in presence of tWo Witnesses.

OTTO GOTTKE.

Witnesses WOLDEMAR HAUPT, HARRY L. WILSON.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patenti.

Washington, D. C.

